Grinding-machine.



No. 658,575. Patented Sept. 25, |900. J. H. MGELROY.

GRINDING ITAGHINE.

(Application tiled Oct. 30, 1899.)

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Patented Sept. 25, |900.

J. H. MGELRDY. FHNDING4 MACHINE.

(no uode.) (LppliCltiOn 6106 0ct.30, 1899.) 3 shaftssheet l' l a i` i L 5 w l l l m -l I N 'l ww l". K :i \N v l i E is I :i In f J N Q ml 3 6MM, www @y NIT-ED- STATES PATENT OFFICEv JOHN HOWARD MCELROY, OF CHICAGO, ILLINOIS.

GRINDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 658,575, dated September 25, 1900.

Application filed'October 30, 1899. Serial No. 735,261. (.No model.)

T0 @ZZ whom, tm/ay concern:

Be itknown that I, JOHN HowARDVMcEL- ROY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Grrinding-lvlachines,A

of which the following isa specification.

My invention is concerned principally with that class of grinding-machines which are known as sickle-grinders and which are employed to grind the blades of the sicklebars of mowing and harvesting machinery, and it belongs to that class of sickle-grinders in which the grinding-wheel is given a rotary movement at a high rate of speed, while it is at the same time vibrated automatically to bring the grinding-wheel in contact with the different portions of the blades which are being ground.

My invention is principally concerned with the novel mechanical movement devised for this class of machinery, in which the mainA driving-wheel is so connected to the shaft upon which the grinding-wheel is mounted as to simultaneously impart the high-speed rotation to the grinding-wheel, while at the same time giving it a vibrating movement across the plane of the blades which are being ground.

Referring now to the sheets of drawings, in which the same letters of reference are used to designate identical parts in all the views, Figure 1 is a side elevation of the complete machine. Fig. 2 is a plan view thereof. Fig. 3 is a side elevation of the opposite side of the machine of that shown in Fig. 1 and with a part of the driving-wheel broken away to more clearly disclose the construction of the parts behind it. Fig. et is adetail in section on the line A A of Fig. 3, and Fig. 5 is a detail showing a slight modification.

The base l of the machine is of any desired construction, adapted to be clamped or otherwise secured to the driving-wheel of a harvester or mower or any other convenient support, and isprovided atv one end with the sickle-holder 2, which may be of any desired construction, the one shown being a common form employed in a machine thatis on the market, and it will be understood that any other form of sickle or otherl implement holder may be employed,as myinvention relates purely to the grinding mechanism proper. At the other end of the base I is the vertical standard 3, which may he of any desired shape or contour, but which I have shown as preferably shaped so as to bring the axis of the driving mechanism over the end of the base 1 and at the same time permit the adjustment of the grindingwheel to any desired height. The standard 3 supports at its upper end the rod 4, which serves as the axis of the moving parts ofthe machine. On eitherside ofthe standard 3 are the arms 5 and 6 of the frame 7, which carries the grinding Wheel orstone 8,journaled in the customary manner in the bearings formed in the yoke constituting the outer end of the frame. The position of the arms 5 and' 6 upon the axis 4t is insured by the sleeve 9, which is mounted upon the axis between t-he standard 3 and the arm 5, and it also serves as a support for the helically-coiled spring l0, which has one end secured beneath or to a pin 11, projecting from the side of the standard 3, (see Fig. 1,) while the other end is placed or secured beneath the lug l2 on the inner side of the arm 5. that the action of this spring 10 is to yieldingly hold the frame 7 and the grinding-wheel 8 in any desired position, preferably at substantially the highest point that it reaches in course of its vibration. Pivotally mounted on the axis 4, adjacent to the arm 6 on the opposite side from the standard 3, is the fork 13, which is secured in any desired position of adjustment relative to the standard 3 by means of the bolt 14 passing through the slot l5 in the arm 16 and through a suitable aperture in the standard 3, against which the arm 16 is clamped by means of the thumb-nut 17, the arm 16 or the standard 3 being provided with a boss 18 to permit of this clamping action between the standard 3 and the yoke 13 withoutin any way clamping the bearing portion of the arm 6 between said members. Of course it will be understood that a washer of suitable thickness might be employed instead of the boss 18. Journaled upon the end of the axis 4, adjacent to the yoke 13, is the driving-wheel 19, which is provided with the customary handle 20 and has the gear-'teeth 2l formed on its periphery and adapted to mesh with the gear-pinion 22, secured on the end of the shaft 23, which carries the grind- It will be readily apparent v IOO ing-wheel 8. It will be apparent that as the wheel 19 is rotated slowly the gear-pinion 22 and its connected grinding-wheel 8 w-ill be rotated very rapidly.

Substantially the mechanism thus far described has been previously employed in rotating the grinding-wheel, and my improvements are concerned with the mechanism to be now described for vibrating the grindingwheel.

The driving-wheel 19 has formed upon its inner face the cam-track 24, which I have shown as being of a circular shape set eccentric to the axis of the driving-wheel, so as to thereby vary the vertical position of the grinding-wheel 3, and thus produce its vibration. 'While I have shown this cam-track as circular, so as to produce a substantially-uniform movement'of Vibration, it will be understood that it might be made of any other shape desired, so as to hold the grinding-wheel stationary, or substantially s0, at any desired position in case it may be desired to grind the implements more at any one point. Coperating with the cam-track 24 is an antifrictionroller 25, which is carried by the lower end of the link 26, which has its upper end pivotally secured to the arm 6 of the frame 7. The lower end of the link 26 passes through and is guided by radial slot 27 in the yoke 13, and

. it will be readily apparent that as the antifriction-roller 25 is advanced to and from lthe axis4 of the machine by reason of the eccentricity of the cam-groove 24, and the link 26, owing to its lower end being confined in the slot 27, will vibrate slightly as well as be reciprocated up and down, thus causing the vibration of the frame 7 and the grinding-wheel 8 about the axis 4 as a center. It will also be apparent that owing to this connection the position of the yoke 13 as determined by the position of its slot 15 will regulate the avervage height of the grinding-wheel, and thus raise or lower it, as may be desired It will also be apparent that if the pivotal con nec tion of the upper end of the link 26 with the armv 6 be moved nearer to or farther from the axis 4, the arc of vibration of the frame 7 will be thereby increased or shortened, as the case may be. As a convenient method of making this adjustment I provide the arm 6 with the slot 28, which slot I preferably notch, as shown, so that the squared body portion 29 of the pin 30 will be held securely in any position in the slot in which it may be placed, while the upper end of the link 26 is pivoted upon the round end 3l of the pin 30, where it is secured in place by the washer 32 and the cotter 33. If it is desired to shift the position of the link 26, it will be apparent that all that is necessary is to pull out the cotter 33 and withdraw the pin 30 and shift it to any desired position. Of course the slot 28 might have its edges smooth; but in that case it would necessitate the employment of the setscrew to clamp the pin in any desired posi- To increase the bearing-surface of the tion.

pin 30, I preferably form the boss 34 on the inner side of the arm 6, adjacent to the slot 28.

The connections between the lower end of the link 26 and the antifriction-roller 25 will now be described.

The link 26 is curved, as shown at 35, in order to permit the yoke 13 to be adjacent to the arm 6, and the lower end of the link 26 has the bolt 36 threaded therethrough. This bolt 36 has its outer end formed with a shoulder and adapted to coperate with a correspondin g interior shoulder on the anti frictionroller 25 to hold the roller in place, and the movement of the roller inward is prevented by the washer 37 which is preferably screwed against a second shoulder 38, formed on the bolt 36 at the end of the bearing portion 39, which carries' the antifriction-roller 25. This washer 37 is hollowed out, as at 40, on its inner side. The lower end of the link 26 is formed with a preferably circular boss or lug 41, through which the bolt 36 is screwed, and which lug passes through and forms the bearing for the link 26 in the slot 27 of the yoke 13. The outer square end of the bolt 36 has bolt is placed in position, and this construction I have devised for the purpose of con- Veniently throwing the vibrating mechanism into or out of operation. When the bolt 36 is in the position shown in Fig. 4, it will be apparent that the antifrict-ion-roller 25 is in the cam-track 24, so that as the drivin g-wheel 19 is rotatedthe frame 7 and the grindingwheel 8 will be vibrated. If it is desired to disconnect the vibrating mechanism, allthat is necessary is to unscrew the bolt 36 from the full-line position of Fig. 4 to its dottedline position, where it will be seen that the antifriction-roller 25 is withdrawn from the cam-track 24 and that the inner face of the washer 37, coperating with the outer face of the yoke 13, will serve to clamp the link 26 in any desired position in the slot 27, thereby fixing the grinding-wheel permanently at. any desired elevation, which of course could be furtherincreased or diminished by means of the adjustment afforded by the slot 15.

In Fig.`5 I have illustrated a possible modification, in which a gear-pinion 43, meshing with the teeth 21 and rigidly connected to a gear-wheel 44, meshing with the pinion 22, might be employed, the gear-pinion 43 and wheel 44 being mounted upon a stub-shaft upon the arm 6 or some other adjacent portion of the frame 7. This modification would be employed if it were desired to give agreater relative speed of rotation to the grindingwheel without increasing materially the size of the driving-wheel 19 or diminishing the size of the pinion 22.

While I have shown my invention as embodied in the form which I at present consider best adapted to carry out its purposes, it will be understood that it is capable of modifications and that I do not desire to be limited in the interpretation of the following the Wing-piece 42 secured thereon after the l IOO IIO

claims except as may be necessitated by the state of the art.

What I claim as new and desire to secure by Letters Patent of the United States, is-

l. In a machine of the class described, the combination of the driving-wheel having a cam-track thereon, with a swinging frame pivotally mounted in relation to said drivingwheel, a stationary member having a slot therein,and alinkhavingone end connected to the swinging frame and its other end cooperating with said cam-track and said slot.

2. In a machine of the class described, the combination of the driving-wheel having a cam-track thereon, with a swinging frame pivotally mounted in relation to said drivingwheel, a grinding-wheel journaled in said frame,connectionsbetweenrthedriving-wheel and the grinding-wheel for rotating the same, a stationary member having a slot therein, and a link having one end pivotally connected to the swinging frame and its other end coperating with said cam-track through the said slot.

3. In a device of the class described, the combination of the driving-wheel having a cam-track thereon, with a swinging frame pivotally mounted in relation to said drivingwheel, a stationary member having a slot therein,andalinkhavingoneendconnected to the swinging frame and its other end coperating with said cam-track and said slot, the connections between said link and the swinging frame being adjust-able to vary the length of the swing of said frame.

4. In a device of the class described, the combination of the driving-wheel having a cam-track thereon, with a swinging frame pivotally mounted in relation to said drivingwheel, a stationary frame in which said drivingwheel is mounted, a yoke adjustably mounted on tbe stationary frame and having a radial slot therein, and a link pivotally connected to the swinging frame and also cooperating with said cam-track and said slot, substantially as and for the purpose described.

5. In a device of the class described, the combination of the driving-wheel having a cam-track thereon, with a swinging frame pivotally mounted in relation to said drivingwheel, a member movably connected to said swinging frame and cooperating with the camtrack, and means for preventing the movement of said member longitudinally of said cam-track.

6. In a device of the class described, the combination of the standard having the driving-wheel mounted therein, with a swinging frame pivotally mounted on said standard relative to the driving-wheel, a grindingwheel journaled in said frame, connections between the driving-wheel and grindingwheel for rotating the latter, and mechanism for swinging said frame as the driving-Wheel is rotated comprising a cam-track on the driving-wheel for controlling the swinging movement of said frame.

7. In a device of the class described, the combination of the standard, having the driving-wheel provided with a cam-track mounted thereon, with a swinging frame pivotally mounted in relation to the driving-Wheel, a yoke member adjustably secured on the standard, a grinding-wheel journaled in said frame, connections between the driving- Wheel and the grinding-Wheel for rotating the latter, and mechanism for swinging said frame as the driving-wheel is rotated comprising a pivoted member upon the frame cooperating with the yoke member and the cam-track on the driving-wheel for controlling the swinging of said frame.

, 8. In a device of the class described, the combination of the standard having the driving-wheel provided with a cam-track mounted thereon, with a swinging frame pivotally mounted in relation to the driving-wheel and having a grinding-wheel mounted therein, connections between the driving-wheel and the grinding-wheel for rotating the latter, and mechanism for swinging said frame as the driving-wheel is rotated comprising a link pivoted to the frame and cooperating with the cam-track and mechanism to prevent it from moving longitudinally thereof.

9. In a device of the class described, the combination of the standard, having the driving-wheel provided with a cam-track mounted thereon, with a swinging frame pivotally mounted in relation to the driving-wheel and the grinding-wheel journaled in said frame, connections between the driving-wheel and the grinding-wheel for rotating the latter, and mechanism for swinging said frame as the driving-wheel is rotated comprising a link pivoted to the frame and cooperating with the cam-track and a stationary slot in connection with the standard.

l0. In a device of the class described. the combination with the standard having' the driving-wheel with the cam-track thereon mounted therein and means for rotatingit, of the swinging frame pivotally mounted in relation to the wheel, a member pivotally connected to said frame and cooperating with the cam-track, connections between the standard and said member to prevent the movement of the latterlongitudinally of the cam-track, and for simultaneously disconnecting said member from the cam-track and securing it to the standard.

1l. In a device of the class described, the combination with the standard having the driving-wheel with the cam-track thereon mounted therein, and means for rotating the driving-wheel, of the swinging frame pivotally mounted in relation to the wheel, a link pivotally connected to said frame and cooperating With the cam-track, a guide in the standard with which said link cooperates to prevent movement thereof longitudinally of the camtrack, and means for simultaneously disconnecting the link and the cam-track and clamping the link to the standard.

IIO

12. In a device of the class described, 'the` combination with the standard having a driving-wheel with the cam-track thereon mount-` ed therein, and means for rotating the driv-` ard with which said link coperates to pre-` vent movement thereof longitudinally of the cam-track, and means for simultaneouslydisconnecting the link and the cam-track and clamping the link to the standard, compris-l ing the bolt 36 screwed into said link and having the antifriction-roller 25 thereon and carrying the washer 37 adapted to clamp the link to the standard when the antiiriction-roller` is withdrawn from the cam-track.

13. In a device of the class described, the combination of the driving-wheel having the cam-track 24 thereon, with the standard having the slot 27 therein, the swinging frame pivotally mounted upon the standard, the link 26 pivotally connected to the swinging frame and having the bearing-lug 41 passing through the slot 27, and the bolt 36 screwed into the link 26 through the lug 41 and having its outer end provided with the antifriction-roller 25 and the washer 37, substantially as and for the purpose described.

14. In a device of the class described, the combination with the stationary main frame, and the grinding wheel frame pivotally mounted therein and carrying the grindingwheel jou rnaled therein, of the driving-wheel for rotating the grinding-wheel, mounted in said main frame and connections between said driving-wheel and the grinding-wheel frame for swinging said frame as the grinding-wheel is rotated, said connections comprising a link, one end of which is adjustable on said grinding-wheel frame to and from the pivotal point thereof so as to vary the arc through which said frame swings.

15. In a device of the class described, the

combination with the stationary main frame,

and the grinding wheel frame pivotally mounted therein and carrying the grindingwheel journaled therein, of the driving-wheel for rotating the grinding-wheel, mounted in said main frame and connections between said driving-wheel and the grinding-wheel frame for swinging said frame automatically as the grinding-wheel is rotated, said connections being separately adjustable to vary the position of the grinding-wheel frame and also to vary the arc through which it swings.

16. In a device of the class described, the combination with the stationary main frame, and the grinding wheel frame pivotally mounted therein and carrying the grindingwheel journaled therein,.of the driving-wheel for rotating the grinding-wheel, mounted in said main frame and connections between said driving-wheel and the grinding-wheel frame for swinging said frame automatically as the grinding-wheel is rotated, said connections comprising a member, such as a link, the position of one end of which is adjustable to vary t-he position of the grindingwheel frame, and the other end of which is adjustable to vary the arc through which said frame swings.

17. In a device of the class described, the combination with the main frame having a driving-wheel journaled therein, of a swinging frame pivotally mounted on said main frame and having a grinding-wheel journaled `therein, connections between said drivingwheel and grinding-wheel for rotating the latter, and mechanism connecting said swinging frame with said driving-wheel whereby the rotation of the latter will cause the reciprocation of the frame, said mechanism including a member adjustably connected with said swinging frame at dierent radial distances from the pivotal point thereof so as to vary the arc through which said frame swings.

JOHN HOWARD MCELROY. Witnesses:

LOUISE E. SERAGE, 4HATTIE O. HAHoRsoN. 

